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Библиотека для cis, online, cms1

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Фёдор Подлеснов 2016-06-29 18:51:32 +03:00
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183
PHPTAL/Php/Attribute/TAL/Define.php Normal file
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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
//
// Copyright (c) 2004-2005 Laurent Bedubourg
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Authors: Laurent Bedubourg <lbedubourg@motion-twin.com>
//
require_once PHPTAL_DIR.'PHPTAL/Php/Attribute.php';
// TAL spec 1.4 for tal:define content
//
// argument ::= define_scope [';' define_scope]*
// define_scope ::= (['local'] | 'global') define_var
// define_var ::= variable_name expression
// variable_name ::= Name
//
// Note: If you want to include a semi-colon (;) in an expression, it must be escaped by doubling it (;;).*
//
// examples:
//
// tal:define="mytitle template/title; tlen python:len(mytitle)"
// tal:define="global company_name string:Digital Creations, Inc."
//
require_once PHPTAL_DIR.'PHPTAL/Php/TalesChainExecutor.php';
/**
* @package phptal.php.attribute.tal
* @author Laurent Bedubourg <lbedubourg@motion-twin.com>
*/
class PHPTAL_Php_Attribute_TAL_Define
extends PHPTAL_Php_Attribute
implements PHPTAL_Php_TalesChainReader
{
public function start()
{
$expressions = $this->tag->generator->splitExpression($this->expression);
$definesAnyNonGlobalVars = false;
foreach ($expressions as $exp){
list($defineScope, $defineVar, $expression) = $this->parseExpression($exp);
if (!$defineVar) {
continue;
}
$this->_defineScope = $defineScope;
if ($defineScope != 'global') $definesAnyNonGlobalVars = true; // <span tal:define="global foo" /> should be invisible, but <img tal:define="bar baz" /> not
if ($this->_defineScope != 'global' && !$this->_pushedContext){
$this->tag->generator->pushContext();
$this->_pushedContext = true;
}
$this->_defineVar = $defineVar;
if ($expression === null) {
// no expression give, use content of tag as value for newly defined
// var.
$this->bufferizeContent();
continue;
}
$code = $this->tag->generator->evaluateExpression($expression);
if (is_array($code)){
$this->chainedDefine($code);
}
elseif ($code == PHPTAL_TALES_NOTHING_KEYWORD) {
$this->doDefineVarWith('null');
}
else {
$this->doDefineVarWith($code);
}
}
// if the content of the tag was buffered or the tag has nothing to tell, we hide it.
if ($this->_buffered || (!$definesAnyNonGlobalVars && !$this->tag->hasRealContent() && !$this->tag->hasRealAttributes())){
$this->tag->hidden = true;
}
}
public function end()
{
if ($this->_pushedContext){
$this->tag->generator->popContext();
}
}
private function chainedDefine($parts)
{
$executor = new PHPTAL_Php_TalesChainExecutor(
$this->tag->generator, $parts, $this
);
}
public function talesChainNothingKeyword(PHPTAL_Php_TalesChainExecutor $executor)
{
$executor->doElse();
$this->doDefineVarWith('null');
$executor->breakChain();
}
public function talesChainDefaultKeyword(PHPTAL_Php_TalesChainExecutor $executor)
{
$executor->doElse();
$this->bufferizeContent();
$executor->breakChain();
}
public function talesChainPart(PHPTAL_Php_TalesChainExecutor $executor, $exp, $islast)
{
if ($this->_defineScope == 'global'){
$executor->doIf('($glb->'.$this->_defineVar.' = '.$exp.') !== null');
}
else {
$executor->doIf('($ctx->'.$this->_defineVar.' = '.$exp.') !== null');
}
}
/**
* Parse the define expression, already splitted in sub parts by ';'.
*/
public function parseExpression($exp)
{
$defineScope = false; // (local | global)
$defineVar = false; // var to define
// extract defineScope from expression
$exp = trim($exp);
if (preg_match('/^(local|global)\s+(.*?)$/ism', $exp, $m)) {
list(,$defineScope, $exp) = $m;
$exp = trim($exp);
}
// extract varname and expression from remaining of expression
list($defineVar, $exp) = $this->parseSetExpression($exp);
if ($exp !== null) $exp = trim($exp);
return array($defineScope, $defineVar, $exp);
}
private function bufferizeContent()
{
if (!$this->_buffered){
$this->tag->generator->pushCode( 'ob_start()' );
$this->tag->generateContent();
$this->tag->generator->pushCode('$__tmp_content__ = ob_get_clean()');
$this->_buffered = true;
}
$this->doDefineVarWith('$__tmp_content__');
}
private function doDefineVarWith($code)
{
if ($this->_defineScope == 'global'){
$this->tag->generator->doSetVar('$glb->'.$this->_defineVar, $code);
}
else {
$this->tag->generator->doSetVar('$ctx->'.$this->_defineVar, $code);
}
}
private $_buffered = false;
private $_defineScope = null;
private $_defineVar = null;
private $_pushedContext = false;
}
?>